AMD XC4020E-1HQ208C

Overview

XC4020E-1HQ208C from Xilinx is a Field-Programmable Gate Array (FPGA) with 20,000 usable gates, 208-pin PQFP package, -1 speed grade (10 ns CLB propagation delay), and embedded SRAM-based logic architecture. It is used in digital signal processing, industrial control logic, and reconfigurable communication interface design.

For engineers reviewing the XC4020E-1HQ208C datasheet, pinout, applications, or equivalent options, key selection criteria include gate count, I/O count (144 user I/Os), speed grade (-1), configuration mode (master serial), and compatibility with Xilinx Foundation Series development tools.

Technical Context

The XC4020E-1HQ208C implements a hierarchical CLB (Configurable Logic Block) architecture with four-input LUTs and flip-flops per CLB. It supports synchronous and asynchronous reset, three-state output control, and global clock routing with dedicated clock buffers.

Configuration is performed via serial PROM or parallel mode using a dedicated 4-bit data bus. The device uses SRAM-based configuration memory, requiring external configuration on power-up, and supports in-system reconfiguration through boundary-scan (JTAG) interface compliant with IEEE 1149.1.

Key Specifications

Pinout & Package

XC4020E-1HQ208C is housed in a 208-pin PQFP (Plastic Quad Flat Pack) package with 0.5 mm lead pitch, 28 mm × 28 mm body size, and exposed thermal pad (non-electrical). Pin numbering follows standard counter-clockwise sequence starting from top-left corner (Pin 1 marked).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar FPGA logic applications.

Compared with XC4020E-1HQ208C, the XC4013E-1HQ160C reduces cost and footprint at the expense of I/O count and logic resources, while the XC4025E-1HQ208C offers direct upgrade path with no PCB revision required due to identical package and pin compatibility.

Availability

XC4020E-1HQ208C is available at Aetrix Electronics and suitable for industrial motion control, telecom line card design, and legacy bus emulation requiring stable component supply across extended production lifecycles.

Supply support for XC4020E-1HQ208C includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Xilinx, now part of AMD, pioneered commercial FPGA technology and developed scalable programmable logic architectures for high-performance digital systems.

The XC4000E family was designed for cost-sensitive, medium-complexity embedded control and interface applications requiring reconfigurable logic with predictable timing and mature toolchain support.

FAQ

What is the configuration method supported by XC4020E-1HQ208C?

The XC4020E-1HQ208C supports master serial configuration using an external serial PROM, as well as parallel slave and JTAG boundary-scan modes. Master serial is the default boot method, where the FPGA initiates configuration upon power-up or PROGRAM pin assertion. XC4020E-1HQ208C does not support slave serial or microprocessor-initiated configuration without external logic.

Does XC4020E-1HQ208C support hot-swap or live insertion?

No, XC4020E-1HQ208C does not support hot-swap operation. Its I/O structure lacks power-on reset sequencing, bus-hold circuitry, or I/O clamping required for safe live insertion. Power must be fully stabilized before configuration begins, and all supply rails (VCCINT and VCCO) must ramp monotonically to avoid latch-up or configuration corruption in XC4020E-1HQ208C.

What is the maximum operating frequency for internal logic in XC4020E-1HQ208C?

The XC4020E-1HQ208C -1 speed grade specifies a maximum CLB propagation delay (t_PD) of 10 ns, enabling internal logic operation up to approximately 65 MHz for typical register-to-register paths. Actual system frequency depends on routing delay, fanout, and logic depth; timing analysis using Xilinx Foundation software is required to verify performance for a given design implemented in XC4020E-1HQ208C.

Can XC4020E-1HQ208C operate with mixed I/O voltages?

Yes, XC4020E-1HQ208C supports mixed I/O voltage operation through banked VCCO supplies. Each I/O bank has independent VCCO pins (e.g., Pins 77–132), allowing different banks to drive 3.3 V, 2.5 V, or 5 V-tolerant interfaces simultaneously - provided all VCCO values remain within 3.0–3.6 V range and are decoupled per Xilinx XC4000E design guidelines for XC4020E-1HQ208C.

Is XC4020E-1HQ208C still in active production?

No, XC4020E-1HQ208C is discontinued by AMD (formerly Xilinx) and no longer in active production. However, Aetrix Electronics maintains verified legacy inventory with full traceability and extended lifecycle support, including obsolescence monitoring and cross-reference assistance for migration paths from XC4020E-1HQ208C.